diff --git a/.changeset/tender-rocks-walk.md b/.changeset/tender-rocks-walk.md
new file mode 100644
index 0000000000..db290471ca
--- /dev/null
+++ b/.changeset/tender-rocks-walk.md
@@ -0,0 +1,5 @@
+---
+"svelte": patch
+---
+
+fix: preserve getters/setters in HMR mode
diff --git a/packages/svelte/src/internal/client/dev/hmr.js b/packages/svelte/src/internal/client/dev/hmr.js
index 3082e47c68..0f79607707 100644
--- a/packages/svelte/src/internal/client/dev/hmr.js
+++ b/packages/svelte/src/internal/client/dev/hmr.js
@@ -28,7 +28,11 @@ export function hmr(source) {
 
 			effect = branch(() => {
 				set_should_intro(false);
-				Object.assign(instance, component(anchor, props));
+				// preserve getters/setters
+				Object.defineProperties(
+					instance,
+					Object.getOwnPropertyDescriptors(component(anchor, props))
+				);
 				set_should_intro(true);
 			});
 		});